Here’s another helpful video from Fujitsu.
If you want to keep your scanner running well for the long haul, or if you are running into problems, before you replace your ScanSnap consumables it may be worth giving it a good clean.
Here’s a video that Fujitsu has posted on the subject.
According to the comments on this post, you can use isopropyl alcohol instead of the official F1 cleaner.
Are you a keener and clean your ScanSnap preventatively?